Water heater



y 1935- J. T. B-AR4ROW 2,001,515

WATER HEATER Filed June 18. 1934 2 Sheets-$heet 1 7 III! (AMES If BAR/POW INVENTOR QLA ,2 MMM ATTORNEY J. T. BARROW May 14, 1935.

WATER HEATER Filed June 18, 1934- 2 Sheets-Sheet 2 Jqmrs TBA/mow INVENTIOR I BY Q Av/ Ma ATTORNEY I Patented May 14, i 1935 UNITED STATES PATENT orrlcs WATER HEATER James T. Barrow, New York, Y. Application June 18, 1934, Serial No. 731,214 12 Claims. (cram- 124s) My invention relates to water heating systems and has particular referencev to systems employing heat exchangers for heating water by steam from heating boilers, employing also separate 5 water heating containers in boiler furnaces.

This is continuation in part of my application Serial No. 700,300, filed Nov. 29, 1933.

The object of my invention is to provide means for heating a limited amount of water in a separate heating unit or element supported in the boiler furnace, this water to be used for household purposes. Another object of my invention is to provide a convenient water heating-element which can be assembled in the furnace of ,a house heating boiler without taking the furnace apart for introducing this element. other object of my invention is to provide means for varying connections between this special container, boiler, heat exchanger, and the tank for l hot water, in accordance with seasonal requirements of service. For this purpose I provide a double two-way valve with which the proper connections are made by the single turn of its handle. This valve is more specifically described in my copending application Serial No. 700,300,

filed Nov. 29, 1933. I also provide a special water heating element composed of two parts which can be fitted or assembled together inside of the boiler furnace. The individual parts of the elethe ordinary door of the furnace, and the unit can be then assembled inside of the furnace above the burner. The other features of my system are similar to those described in my Patent No. 1,958,736.

My invention is more fully described in the accompanying specification and drawings in which Fig. 1 is a sectional elevation of a boiler with my heating system, Fig. 2 is a sectional view of my heating element, Fig. 3 is a top view of the same partly in section, Fig. 4 is a side view of one component part of the element Fig. 5 is a side view of the heating element partly in section taken on the line 5-5 of Fig. 3, Fig. 6 is a top view of one component part of the element, Fig. 7 is a detail view of the closing plate, Fig.'8 is a top view of a modified device partly in section, Fig. 9 is a side view of one portion of the same, Fig. 10 is a side view of the element, Fig. 11 is a partial sectional view of another modification of the heating element, Fig.12 is a partial side view of this modification, and Fig. 13 is a partial sectional view of another modification.

My water heating system comprises a boiler Still an- I with an oil burner 2 in a furnace 3. A pipe 4 extends from the water gauge 5 in the upper portion of the boiler to an outer shell 8 of a heat exchanger. The lower portion of the shell is connected by a pipe i with the lower portion of theboiler and with a pipe 8 which supplies water for the house heating system. A steam pipe 9 connects the top of the'boiler with the pipe 0. The pipe also connects with a double two-way valve II bya pipe Ill. The same side of the valve is connected by a pipe I2 with the pipe l. The valve has a handle it for turning it thereby changing connections between different pipes connected with it. The other side of the valve is connected by pipes' it and I with a circular heating element or container I6 for water. This container is supported on legs I? above the burner2 and is heated by the same.

The container consists of two symmetrical semicircular portions provided with angular lugs I8 and I8 made so that the smaller lugs I8 fit inside of the lugs I8. The ends of the container halves are milled down and provided with tapering sides I9 into which fit cover plates 20. Bolts 2I tighten the plates against the joined lugs. The tapers on the plates, acting on the tapered portions on the ends of the halves, draw them apart thereby tightening the joints between the angular I portions of the lugs. Gaskets22 are provided for ment are sufficiently small to be inserted through rendering the joints water tight. One of the plates at one end has a hole I4 for the pipe I4,

and one of the plates at the other end has a hole I5 for the pipe I5. members I6 are of such size that they can be inserted in the furnace through its front door 23. The plates 20 may be previously screwed on'the ends of the pipes I l and I5. The members I6 are then fitted together by sliding the interlocking lugs-I8 and I8 over each other. The free plates 20 are then placed on the joints with the gaskets 22, the gaskets being also placed under the plates 20 on the pipe ends. The plates are then drawn together by the bolts 2I tightly clamping the joints. The spreading action of the tapered ends of the plates engaging the tapers I9' of the members II; will tighten the lugs I8 and I8 together, forming hermetically sealed joints.

The valve I I has ports opposite the pipes III and The hollow semicircular I5 connected with pipes 24 and 25 connected with 4 a coil 26 of the heat exchanger inside of the housing 6. Pipes 2! and 28 extend from the pipes 24 and 25 to the top and bottom of a storage tank 29 for hot water.

A pipe 30 leads from the top of the tank to the supply system of the hot water for household purposes. A pipe 3I serves to feed freshwater to the heating system, and a pipe 32 is used for draining the system. It is provided with a cook 33. A safety blow-off valve 34 is placed on the pipe I4. An electric regulator 35 of an ordinary construction is placed on the pipe 4 and may be connected with the burner 2 for regulating the temperature of the boiler water. Any ordinary temperature control may be used for this purpose, as well as a manual control.

e operation of my .system is as follows. During the winter, when the boiler I is being operated for heating the house, water in the tank 29 is heated by the heat exchanger through which circulates the hot boiler water, heating the coil 26. Hot water rises to the top of the tank through the pipe 27, and the cold water is fed into the coil through the pipe 28 from the bottom of the tank. The circulation continues until the heat balance is established. The valve handle I3 is turned to the left disconnecting the coil 2Hv from the heating member I6. The latter is then connected through the pipes I4 and I5 with the boiler I, the pipes I 0 and I2 being connected'in the valve with the pipes I4 and I5. Water in the heating element circulates through the boiler thereby forming a supplementary supply of hot water for the boiler. The heating element in this case increases the boiler capacity by adding to its heating surface and volume of' water, at the same time utilizing more efflcientlythe heat of the burner. Water for household purposes is heated indirectly from the boiler through the heat exchanger.

In summer when the boiler is not used, the valve handle I3 is turned to the right,'disconnecting the pipes I0 and I2 and connecting the pipes I4 and I 5, with the pipes 24 and 25 respectively. With these connections the heating element heats directly water in the, tank. Water circulates through the pipes 28 and I5 from the tank into .the heating element, and through the pipes I4 and 21 from the heating element into the tank. Hot water from the heating element also circulates through the coil'26 thereby heating the water in the heat exchanger shell Ii. The

- heated water enters the boiler through the pipe 4,

boiler entering the shell cold water from the through the pipe I. The boiler water thereby gradually becomes heated and serves as an additional supply of hot water for household purposes, or it may be used to heat the tank water through the heat exchanger, if the burner is temporarily extinguished.

A modified construction of the water heating element or container is shown in Figs. 8, 9 and 10. It consists of two symmetrical halves 36 provided with pipe nipples 31 for connecting the element with the pipes I4 and I 5. The halves have bosses 38 inside drilled for bolts 39. Corresponding bosses 40 are provided on the outside for the bolts. While the unit is circular in its general shape, the inner sides are flattened as shown in order to compensate for the space used for the inner bosses 38 and to provide thereby a constant area inside for the circulationof water. water tight joints. This construction has a advantage that, the bolts do not come in contact with water. w

Another modification is shown in Figs. 1-1 and 12. The two halves" have their ends taperin at an angle and are joined by bolts 42 passing their ends.

drilled for the bolts in order to keep the bolts Gaskets 4| form from contact with water. Gaskets 45 render the joints water tight. "Lugs 46 are provided on the sharp ends overlapping the blunt ends of the halves in order to keep the sides from creeping or sliding transversely under pressure from the bolts.

Important advantages of my system are that it can be installed in any existing boiler used for household heating, also that it increases the boiler capacity and its heating surface. It permits the use of the burner of the boiler in the summer for obtaining hot water for household purposes when the boiler is not used for heating the house. My heating element has an. advantage that it is made of two halves which can be inserted into the boiler furnace through its door and assembled inside of the furnace into the completeheating unit, so that the whole installation can be made for the boilers already installed and in operation. The transverse bolts 43 can be placed at an angle with the halves 42' of the water heater as shown in Fig. 13. be entirely omitted.

I claim as my invention: a

1. A heating element for a water heating system, comprising two hollow semicircular members, angular lugs on the ends of said members, the lugs on one end of each member being smaller than the lugs on the other end, the larger lugs being adapted to slidably fit over the smaller lugs, thereby joining together said members into a ring-shaped container with an annular chamber inside, closing members for the sides of said ring at the joints formed by said lugs, means to tighten said closing members against said joints thereby rendering said joints leakproof, means for supporting said heating element inside of the furnace of a boiler above the burner of said furnace, and an inlet and an outlet in said container for connection with water pipes.

2. A heating element for a water heating system, comprising two hollow members open at their ends, angular lugs on the ends of said members, engaging the corresponding lugs of another by said lugs, bolts clamping said sealing members against said joints thereby rendering said joints waterproof, said members being adapted to be assembled inside .of the furnace of a boiler, form-t ing 'a ring-shaped container for water, means to support said container in saidfurnace, and an inlet and an outlet in said container for connection with water pipes. 3.' A heating element for a water heating system, comprising two hollow members open at ;their. ends, -mutually interlocking lugs on the ends of said members, means to close the joints formed by said lugs and to tighten said lugs against each other thereby rendering said joints waterproof, said members with said joints forming a ring shaped container for water, means for supporting saidv container inside of a furnace of a boiler, and an inlet and an'outlet insaid container for connection with water pipes.

4. A heating elementfor a water heating system, comprising two hollow members open at their ends, lugs on the ends of said members, the

lugson one endiof eachmember being larger g than on the other end, the small lugs of one'memher being slidably engaged by the large lugs of the other member bysliding in direction perpendicular to the-plane of said members; said members with ,the lugs thus engaged forming In that case the lugs 46 may' .member, sealing members for the joints formed a container for water, closing plates for the sides of said lugs, bolts for tightening said plates against said lugs thereby rendering'the joints be-' said members waterproof, means for supporting said elements inside of boiler, and an inlet and an outlet in said container for connection with water pipes. v

5. A heating element for a water heating system, comprising t o hollow members open at their ends, lugs on the ends of said members, said lugs on one end of each member being smaller than the lugs on the other end, the larger lugs being adapted to partly enclose the smaller lugs, said larger lugs being adapted to slide over said smaller lugs in direction perpendicular to the plane of said members, said members with the lugs mutually engaged forming a hollow closed container for water, plates fitting over the sides of said lugs. said plates being provided with ,tapered edges, said members being provided with tapered shoulders at their ends back of said lugs,

' inside of said members for said plates being the tapered edges, bolts adapted to draw said plates against the sides of said lugs, said plates being adapted to spread said members apart by said tapered edges thereby tightening the outer edges oi the larger lugs against the inner sides of the smaller lugs, said members with their lugs mutually engaged and withsaid plates and bolts assembled forming a hollow enclosed container for water, means for supporting saidcontainer inside of the furnace oif 'aboiler, and an inlet and an outlet in said container for connection with water 6. A heating element for a water heating system, comprising two hollow semicircular members open at their ends, said ends being shapedto fit together so as to form watertight joints, said members being adapted to be assembled togetherinside of a boiler furnace forming a ring-shaped conqtainer for water, bolts connecting together said,

members and passing through the water space in said container, bossesinside of said members for protecting said bolts from contact with the water inside of said container.

'7. A water heating element for a water heating system, comprising two semicircular hollow membersopen at their ends, said ends being. fitted together so as to form watertight joints, bolts adapted to join said members and passing through the inside space in said members, bosses for said bolts protecting said bolts from contact with water inside, and bosses on the outside for the heads of said bolts, said members being adapted to be assembled inside of a boiler.

Iumace. I

8. A water heating element for a water heatthe furnace of aadapted to fit said shoulders by v at their ends, the ends ing system, comprising two semicircular hollow members open at their ends,"bolts passing through said ends and connecting said members together,

said bolts passing through the inside space in said members, saidends eing fitted together so as to form watertight 1] nts, bosses inside protecting said bolts from contact with the water inside, the walls of said members at their eds being shaped to avoid diminishing the internal cross-sectional area of the passage through the members.

9. A water heating element for a water heating system comprising, two semicircular hollow members open at their ends, bolts passing through said ends transversely to the plane of said members, said members forming a ring-shaped container forwater adapted to be assembled inside of a boiler furnace, the ing formed at an angle with said bolts and adapted to form watertight joints, and means to prevent mutual sliding of said ends when tightened together by said bolts.

10. A water heating element for a water heating system, comprising two hollow members open of one member being shaped to fit the ends of the other member, bolts to join together said members and passing through said ends transverse to the plane oi? said element and through the water space in said members, bosses inside of said members totally enclosing said bolts, and means to render the'joints between said 7 11. A-water, heating element for a water heating system, comprising two hollow members open at their ends, the ends of one member abutting the ends of the other member, the planes of abutment being at an angle with the plane of said members, bolts to join together said members at their ends and passing through said ends and through'the water space. in said members at an angle to the planes of abutm t, and means to render the joints between said members leakprooi, said members when connected by said bolts forming a ring-shaped container;

12. A water heater, comprising two hollow semicircular members ends being fitted together so as to form watertight joints, said members being adapted to'be assembled together inside or a boiler furnace forming a ring-shaped container for water, means er, and an inlet and an outlet for container. 55

ems, '1'. marrow.

ends of said members be-. I

in a direction substantially open at their ends, said 

